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The Understanding Of Genetics (biology Only) (GCSE Biology)

The following is a GCSE Biology test covering 'The Understanding Of Genetics (biology Only)' from the broader topic Inheritance, Variation And Evolution. The test is geared towards the AQA exam board style syllabus.
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In humans, sex is determined by X and Y chromosomes. Which gamete from a father determines the genetic sex of the child?
Polydactyly is caused by a dominant allele. Which offspring genotypes from parents with genotypes Dd and dd will have polydactyly?
Which statement best describes homologous structures found in the limbs of different vertebrates?
Which term describes the physical appearance produced by an organism’s genes and environment?
Which process produces gametes with half the chromosome number and creates genetic variation by independent assortment and crossing over?
Why do polygenic (many-gene) traits tend to show continuous variation in a population?
What is the name for a change in the DNA sequence that can create a new allele?
In Darwin’s theory, what role do environmental pressures (like predators or drought) play in evolution?
Why is sexual reproduction important for evolution?
Which of the following best describes genetic drift?
What evidence from modern genetics most strongly supports common ancestry among related species?